DK174620B1 - A valve assembly - Google Patents

A valve assembly Download PDF

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Publication number
DK174620B1
DK174620B1 DK200000581A DKPA200000581A DK174620B1 DK 174620 B1 DK174620 B1 DK 174620B1 DK 200000581 A DK200000581 A DK 200000581A DK PA200000581 A DKPA200000581 A DK PA200000581A DK 174620 B1 DK174620 B1 DK 174620B1
Authority
DK
Denmark
Prior art keywords
valve
valve body
cavity
characterized
flow passage
Prior art date
Application number
DK200000581A
Other languages
Danish (da)
Inventor
Gunnar Norton Svendsen
Original Assignee
Maersk Medical As
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maersk Medical As filed Critical Maersk Medical As
Priority to DK200000581 priority Critical
Priority to DK200000581A priority patent/DK174620B1/en
Publication of DK200000581A publication Critical patent/DK200000581A/en
Application granted granted Critical
Publication of DK174620B1 publication Critical patent/DK174620B1/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/04Tracheal tubes
    • A61M16/0463Tracheal tubes combined with suction tubes, catheters or the like; Outside connections
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/0023Suction drainage systems
    • A61M1/0039Handpieces
    • A61M1/0041Handpieces with means for varying suction manually
    • A61M1/0043Handpieces with means for varying suction manually by changing the section of the line

Description

DK 174620 B1 i

A valve assembly

The present invention relates to a valve assembly of the kind set forth in the preamble of claim 1.

5

There are already known such valve devices specially designed for use in endotracheal aspiration systems of a patient. Reference is made in this connection to, for example, British patent no.

No. 10,220,736, U.S. Patent No. 4,569,344, and French Patent Application No. 2,682,603. These writings are to be considered as part of this text.

However, although the known valve devices meet a long range of the applicable functional requirements, they are all subject to disadvantages. These can be attributed not only to high manufacturing costs, but also to constructive deficiencies that in certain situations can reduce the efficiency of the valve devices. Thus, with the known valve devices, secretion sucked from the patient can be deposited on the valve body itself, which can cause sealing problems when the connection to the vacuum source is disconnected. Also, an unfortunate build-up of secretion may occur in the interior of the valve body.

The invention seeks to provide an improved valve arrangement relative to the known valve devices which not only seeks to alleviate the problems described, but which can also be assembled by a relatively simple operation using a few components.

2 DK 174620 B1

This is achieved by the invention as defined in claim 1. Thus, in the invention, the valve chamber has substantially no moving surfaces in the flow path of fluid aspirated from the patient.

In the preferred embodiment of claim 2, a device is provided which is easy to operate, a downward pressure of the actuator button towards the valve chamber will cause a corresponding downward movement of the valve body, and thus an opening of the flow passage through the valve chamber. .

In the embodiment of claim 3, the valve device is suitably enclosed in an actuator housing having a surface with which the user of the device can provide a reaction force against the downward compressive force of the actuator button.

The flexible diaphragm which seals the opening for receiving the valve body may preferably have resilient properties, and may thus constitute the spring device for controlling the movement of the valve body. The flexible diaphragm may with particular advantage form an integral part of the valve body. The valve body may further advantageously comprise engaging means which allow a direct attachment to the coupling device via complementary engaging means formed on the coupling device.

By designing the valve assembly as claimed in claim 7, self-sealing properties are obtained, as a negative pressure from the vacuum source will only cause an increased contact force between the valve body and the valve seat when the actuator button is in its first position in which the two flow passages are mutually blocked.

5

The invention will be explained in more detail below with reference to the embodiment shown in the drawing. The drawing shows the following: 10 FIG. Figure 1 shows part of a system for endotracheal ventilation of a patient

FIG. 2 shows a valve arrangement according to the invention, seen in cross section, 15

FIG. 3 shows the vent of the device of FIG. 2 in exploded view, and

FIG. 4 and 5 show part of the valve assembly shown in FIG. 2, in an open and a closed position of the valve body, respectively.

The mode of operation shown in FIG. 1, in principle, corresponds to the operation of, for example, the system described in Danish Patent Application No. 32/95. A flexible casing or sleeve 50 is connected at its first end 52 to the valve assembly 200 of the invention and at its second end 54 is connected to a manifold 100. The valve assembly 200 is arranged to the left to be connected to a suction device not shown for further providing a vacuum in the system 1. The manifold 4, which is preferably transparent, is further adapted to be connected via a coupling 300 to a tube or "tube" for endotracheal ventilation of a patient, i.e. a tube adapted to be inserted into the patient's airways to maintain an artificial ventilation of the patient. An aperture 142 in a vent nozzle 141 permits ventilation of the patient by means of a conventional apparatus not shown.

10

The system 1 further comprises, in a conventional manner, a catheter 40 which extends into the interior of the casing 50 and which can be inserted into the patient's airways for secretion extraction. The catheter 40 is firmly connected at its first end 42 to the valve assembly 200 and at its other end 44 is slidably accommodated in the manifold 100, the catheter being sealed via a gasket 104 relative to the casing 50 so that fluid cannot penetrate into the casing . The gasket 104 further provides a scraping of the exterior of the catheter 40 of the secretion while withdrawing the catheter from the patient. It will be appreciated that the other end 44 of the catheter forms a suction tip which, upon simultaneous folding of the sheath 50, may be displaced through the interior of the manifold and into the tubing not shown to ventilate the patient. Thus, in this movement, the end 44 of the catheter is directed to the right in FIG. 1. In this way, it becomes possible to perform a regular extraction of secretion in the patient's respiratory tract, the operator connecting the system 1 to the suction device by operating an actuator button 210 arranged in the valve device 200.

5 DK 174620 B1

FIG. 2 shows in more detail the valve device 200 according to the invention. The valve assembly comprises an actuator housing generally designated by reference numeral 5,270 and having an internal cavity 282. From the actuator housing 270 extends a first cylindrical tube member 235 and a second cylindrical tube member 240 with which the valve member 200 can be connected. a suction catheter 40, respectively, and with a suction device not shown. The first 235 and the second 240 tubes define a first and a second flow passage through the valve means 200, respectively, and the longitudinal axes of the tubes are arranged mutually offset. The flow passages open into the interior of the valve assembly 200 in respective regions 237, 242. Around the first pipe piece 235 is arranged a further third pipe piece 230, with which the valve assembly 200 can be connected to the aforementioned casing 50.

More specifically, the actuator housing 270 is defined by a wall 281 and has a cover portion 272 which is preferably transparent. The lid part 272 has a hinge 273, whereby the lid part 272 can be turned to a position which gives the user access to an actuator button 210 arranged in the interior. of the actuator housing 270. When the lid portion 272 is closed, it can be held in engagement with the actuator housing 270 by bar-like means 274, and in this position provides a visual indication that the valve assembly 200 is not in the suction state. The actuator button 210 can be applied by applying a downward compressive force from the shown position to a second position, in which the flow formed by the first pipe piece 235 and the second pipe piece 240 is brought into flow, as will be explained. closer.

The actuator housing 270 also comprises a valve housing arranged in the cavity 282 of the actuator housing 270 defining an internal valve chamber consisting of a lower or first cavity 220 and an upper or second cavity 222. The valve housing constitutes a separate portion of the actuator housing. 27 0, and the wall housing 216 of the valve housing not only defines the valve chamber but also the said pipe pieces 23 0, 235 and 240. The pipe pieces 230, 235 and 240 extend as shown from the interior 282 of the actuator housing 27 through openings in the wall 281 of the actuator housing 270.

In the valve chamber, a valve body 250 is arranged to block the flow connection between the first pipe piece 235 and the second pipe piece 240. The valve body 250 is arranged in the lower cavity 220 in the valve housing 20 and is biased so that in the normal position of blocking the connection between the two pipe pieces. 235, 250. For this purpose, the valve body comprises a first portion 252 which is in the form of a pin with a downwardly open cavity and cooperates with a valve seat at the transition between the upper 222 and lower 220 cavities, and a second spring-like portion. 253, which is adapted to provide a biasing force by which the first part 252 is held tightly against the valve seat in the normal position of the valve body 250. Preferably, the first 252 and second portion 253 of valve 30 are made of one of a suitable plastic material. The valve body 250 is connected to the actuator button 210 via a coupling device 260 which extends externally with respect to the valve housing 215.

The coupling device 260 comprises, as shown, a pin-like member 262 adapted to be secured in the downwardly open cavity of the first portion 252 of the valve body 250. For this purpose, the pin-like member 262 has peripherally arranged engagement means 263 which cooperate with complementary engagement means. arranged on the inner surface of the cavity in the interior of the first portion 252 of the valve body 250.

FIG. 2 further shows how the cavity 220 together with the additional cavity 222 forms a flow passage connecting the first pipe piece 235 to the second pipe piece 240. It can be seen that the additional cavity 222 is arranged in extension of the cavity 220, along a axis A extending perpendicular to the tubes 235, 240. Both cavities are preferably rotationally symmetrical 20 about the axis A. When fluid flows through the valve assembly 200, this fluid, after passing through the flow passage in the tubing 235, will deflect along the axis A of thereafter to flow further through the flow passage in the pipe piece 240. Taking into account the later terminology used, the cavity 222 is to be understood as located at the upper or first side of the valve housing 215, while the cavity 220 is to be understood as located at the lower or second side of the valve housing 215.

In FIG. 3, the components included in the valve assembly 200 are shown prior to assembly. Reference numeral 215 marks the valve body, which is preferably manufactured as an integrated unit. It can be seen that the cavities 220, 222 in the interior of the valve housing 215 constitute vaulted or dome-shaped portions of the valve housing 215. The cavity 220 has at the bottom an opening 219 which is defined by a circular edge 217, which preferably extends in a plane perpendicular to the axis A. The opening 219 allows mounting of the valve body 250.

10 It can be seen from FIG. 3, the first portion 252 of the valve body 250 has a pin-like shape, while the second portion 253 is constituted by a flexible cup-shaped membrane acting as a spring. The flexible diaphragm provides the actual sealing of the opening 219 of the valve housing 15 215, and the diaphragm is preferably attached to the edge 217 defining the opening 219 via an annular fixing member 255 which is welded to the edge 217 of the valve housing 215 and to a circular edge 251, respectively. valve body 250. FIG. 3 also shows the coupling device 260 connecting the actuator button 210 to the valve body 250. The coupling device 260 comprises a contact surface 265 with which the coupling device 260 can cooperate with the actuator button 210.

25 It is further apparent from FIG. 3, how the actuator housing 270 can advantageously be formed by two half-parts 275, 280 arranged for assembly. In aggregate, the two half-parts 275, 280 form an enclosure around the valve body 215, with the actuator button 210 abutting against the coupling device 260, which is blinded by the valve body 250, which in turn is closely connected to the valve body 215. upper half 275 has a cutout by which the user can access the actuator button 210.

Both the actuator button 210 and the coupling device 260 are provided with recesses with respective bottom edges 213, 5,261, the purpose of which will appear below.

Referring now to FIG. 4 and 5 showing the valve assembly in a first and second outer positions of the valve body 250, respectively. The figures show, for the sake of simplicity 10, the valve assembly 200 without the upper half 275 of the actuator housing 270.

In the embodiment shown in FIG. 4, the first portion 252 is displaced downwardly along axis A, i.

15 away from the valve seat 225 of the valve body 215 formed at the transition between the lower cavity 220 and the upper cavity 222. This displacement movement is possible because the second cup-shaped portion 253 of the valve body 250 is flexible and can assume the position shown in FIG. 4 outlines position 20 in which internal stresses are built up in the cup-shaped portion 253 which seeks to bring the first portion 252 of the valve body into contact with the valve seat 225.

As previously mentioned, both the actuator button 210 and the coupling device 260 have respective bottom edges 213, 261, which constrain the movement of the actuator button 210 and the coupling device 260 along the axis A. It will be understood that the bottom edge 213 is arranged so that the user can depress the actuator button 210 in 30. such an extent that the first portion 252 of the valve body is extensively extended completely out of the flow path of fluid passing through the cavities 220, 222, the strength and flexibility of the second portion 253 of the valve body 250 being adapted to this maximum movement along the axis A. Conversely, the bottom edge 261 of the coupling device 260 will preferably be formed to abut an area 218 of the valve housing 215 in the closing position of the valve body 250. Hereby it can be ensured that the first part 252 of the valve body abuts against the valve seat 225 with a certain abutment force, as a complete relief of the internal stresses in the second part 253 of the valve body can be avoided.

It is an important feature of the invention that the coupling device 260 connecting the valve body 250 to the actuator button 210 extends beyond the cavities 220, 222, i.e. outside the valve body 215. This ensures an unobstructed flow of fluid through the valve means 200. At the same time, it will be observed that a negative pressure at the pipe piece 240 will impart self-sealing properties to the valve means 200, when the venous body 250 is in the position shown in FIG. . 5 will increase the seal between the valve body 250 and the valve seat 225.

FIG. 5 shows the second state of the valve body 250, in which state the first part 252 abuts the valve seat 225. It is clear from this drawing that a narrow passage 232 is formed in the space between the first pipe piece 235 and the third pipe piece 230. is arranged to connect the interior of the casing 50 30 to the outside. The passage 232 preferably opens in a filter 208 which serves to ensure the secretion of any content of harmful substances in the air in the casing. The passage allows a displacement and suction of air into the casing 50 when the casing is collapsed and extended, respectively, by using the catheter 40. The air 5 can thus pass along the path indicated by the line L in FIG. 2. FIG. 5 further shows the valve device 200 without the one shown in FIG. 2, the casing 50 can be secured around the pipe piece 230. The fixing bush 205 is more precisely clipped to the pipe piece via a mounting flange 206 and the casing is held by friction between the surfaces of the fixing bush 205 and the pipe piece 230.

It will be understood from the foregoing that a user of the turning device will first open the lid portion 272 and thus hold with the palm about the lower half 280 of the actuator housing. To allow fluid flow through the valve assembly 200, the user then presses the actuator button 210 downwardly until the bottom edge 213 abuts against the surface of the valve housing 215 in a region 218 '.

Claims (10)

  1. A valve device (200) for a closed system for endotracheal aspiration of a patient via a catheter, the valve device (200) comprising: a wall (216) defining a valve chamber (220, 222), a first flow passage (235) by which the valve chamber (220, 222) can be connected to said catheter, - a second flow passage (240) by which the valve chamber (220, 222) can be connected to a vacuum source, a valve body arranged in the valve chamber (220, 222). and arranged to be able to pass along an axis A from a first position in which the first (235) and the second (240) flow passage are separated from each other to a second position, in which the first (235) and the second (240) flow passage case is interconnected - a manually operated actuator button (210) for the valve body, which actuator button (210) is arranged to be movable between a first position and a second position, a coupling device (260) connected with the valve body and with the actuator button (210) for transmitting the movement of the actuator button (210) to the valve body (250), a spring device for holding the valve body in said first position, characterized in that - the wall (216) comprises an opening (219) for receiving the valve body (252), a flexible diaphragm (253) forming a seal of said opening (219) in the valve body (215), - the flexible diaphragm (253) being connected to the valve body (252) and the valve housing 10 (215), respectively, and - the coupling device (260) extends externally with respect to the valve chamber (220, 222).
  2. Valve device according to claim 1, characterized in that - that the actuator button (210) is arranged at a first side of the valve chamber (220, 222) and - that the coupling device (260) is arranged at an opposite side of the valve chamber (220, 222).
  3. Valve device according to claim 2, characterized in that - an actuator housing (270) encloses the valve chamber 25 (220, 222) and the coupling device (260), and - that the actuator housing (270) comprises an access opening allowing access to the actuator button (210). ).
  4. Valve device according to any one of the preceding claims, characterized in that the flexible membrane (253) of the DK 174620 B1 forms the said spring device.
  5. Valve device according to any one of the preceding claims, characterized in that the valve body (252) comprises a cavity (252) which faces away from the valve chamber (220, 222) with the first engagement means, 10. that the coupling device (260) comprises a tap the body (262) with other means of engagement (263) arranged to cooperate with said first means of engagement.
  6. Valve device according to any of the preceding claims, characterized in that the valve chamber is formed by a first vaulted cavity (220) and a second vaulted cavity (222) located above the first cavity, 20. the first (220) ) and the second (222) cavity are rotationally symmetrical with respect to axis A, that the first cavity (220) opens into the opening (219) and that the transition between the first (220) and second 25 (222) cavities forms a valve seat (225).
  7. Valve device according to the preceding claim, characterized in that - the first flow passage (235) is arranged to open in the first cavity (220) and DK 174620 B1 - that the second flow passage (240) is arranged to open in the second cavity (222).
  8. Valve device according to any of the preceding claims, characterized in that the coupling device (260) and the actuator button (210) are formed in one.
  9. Valve assembly according to any one of the preceding claims, characterized in that - a third flow passage (230) encloses said first flow passage (235) - that the wall (216) also defines a passage (232), which at a first end opens into said third flow passage (230) and which at the other end opens freely.
  10. Valve device according to the preceding claim, characterized in that the passage (232) also comprises a filter means (208).
DK200000581A 2000-04-06 2000-04-06 A valve assembly DK174620B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK200000581 2000-04-06
DK200000581A DK174620B1 (en) 2000-04-06 2000-04-06 A valve assembly

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
DK200000581A DK174620B1 (en) 2000-04-06 2000-04-06 A valve assembly
AU4640001A AU4640001A (en) 2000-04-06 2001-04-05 A valve device
ES01919240T ES2228837T3 (en) 2000-04-06 2001-04-05 Valve devices.
PCT/DK2001/000232 WO2001076673A1 (en) 2000-04-06 2001-04-05 A valve device
EP20010919240 EP1267979B1 (en) 2000-04-06 2001-04-05 A valve device
US10/240,882 US6811142B2 (en) 2000-04-06 2001-04-05 Valve device
DE60106731T DE60106731T2 (en) 2000-04-06 2001-04-05 Valve device
AT01919240T AT280607T (en) 2000-04-06 2001-04-05 Valve device
DK01919240T DK1267979T3 (en) 2000-04-06 2001-04-05 A valve assembly

Publications (2)

Publication Number Publication Date
DK200000581A DK200000581A (en) 2001-10-07
DK174620B1 true DK174620B1 (en) 2003-07-28

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
DK200000581A DK174620B1 (en) 2000-04-06 2000-04-06 A valve assembly
DK01919240T DK1267979T3 (en) 2000-04-06 2001-04-05 A valve assembly

Family Applications After (1)

Application Number Title Priority Date Filing Date
DK01919240T DK1267979T3 (en) 2000-04-06 2001-04-05 A valve assembly

Country Status (8)

Country Link
US (1) US6811142B2 (en)
EP (1) EP1267979B1 (en)
AT (1) AT280607T (en)
AU (1) AU4640001A (en)
DE (1) DE60106731T2 (en)
DK (2) DK174620B1 (en)
ES (1) ES2228837T3 (en)
WO (1) WO2001076673A1 (en)

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DK1267979T3 (en) 2005-02-14
EP1267979B1 (en) 2004-10-27
US6811142B2 (en) 2004-11-02
AU4640001A (en) 2001-10-23
AT280607T (en) 2004-11-15
DE60106731D1 (en) 2004-12-02
US20030047704A1 (en) 2003-03-13
DK200000581A (en) 2001-10-07
WO2001076673A1 (en) 2001-10-18
ES2228837T3 (en) 2005-04-16
EP1267979A1 (en) 2003-01-02
DE60106731T2 (en) 2005-12-15

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